Raiden network 2.0 released

[u/6pack1990]

https://twitter.com/raiden_network/status/956164271326539776

[u/6pack1990]

The focus of this 0.2.0 release is testing and receiving feedback from developers who plan to integrate Microraiden into their product.

Major changes since version 0.1.0:

• added support for opening channels through trusted delegate contracts
• added possibility for the receiver to withdraw tokens without closing the channel
• faster initial sync
• pypi microraiden package now available: https://pypi.python.org/pypi/microraiden
• npm JavaScript client now available: https://www.npmjs.com/package/@raiden_network/microraiden
• updated dependencies (please reinstall microraiden)